US 12,347,614 B2
Electromagnetic systems for the selective manipulation of magnetically-barcoded materials
Peter Tseng, Oakland, CA (US); and Amirhossein Hajiaghajani, Oakland, CA (US)
Assigned to The Regents of the University of California, Oakland, CA (US)
Appl. No. 17/764,753
Filed by The Regents of the University of California, Oakland, CA (US)
PCT Filed Sep. 29, 2020, PCT No. PCT/US2020/053281
§ 371(c)(1), (2) Date Mar. 29, 2022,
PCT Pub. No. WO2021/067272, PCT Pub. Date Apr. 8, 2021.
Claims priority of provisional application 62/907,849, filed on Sep. 30, 2019.
Prior Publication US 2022/0384081 A1, Dec. 1, 2022
Int. Cl. H01F 7/02 (2006.01); H01F 1/44 (2006.01); H01F 7/20 (2006.01)
CPC H01F 7/0247 (2013.01) [H01F 1/44 (2013.01); H01F 7/206 (2013.01)] 18 Claims
OG exemplary drawing
 
15. A method of forming a magnetic barcode, comprising:
providing a gel precursor solution including dispersed magnetic particles; and
inducing gelation of the precursor solution in the presence of a spatially varying magnetic field to yield a gel in which the magnetic particles are aligned into magnetic chains having spatially varying orientations across multiple domains in the gel.